I really appreciate that you are working on this, the car really needs a back up camera.
I have been whining about the cost, which I think is to high still but having it integrated into the stock display would be better in some ways than a mirror display like I have been looking into. I have a mirror display in my Duramax I will no longer need so considering a swap to the ST and it actually is better that it might seem in actual use since looking up at the mirror is something we do all the time and then the side mirrors, more intuitive than looking at the dash display in our 4 runner though a much bigger screen but the ST is in a better location so it will be great to have it there. This makes me lean more towards the Nav-TV system....
Then I had a thought, since the display is the same, how about switching the factory HU brain/CD player out to the one from the Titanium Fiesta?
Then I though, do any of the Ford vehicles come with a system like this but also with DVD instead of just CD?
I am going to look from this approach to see what I can figure out.
Another option, wireless cameras, I have a high end system on my trailer, WiFi, works well about 50 ft behind us, perhaps there is a wireless camera and receiver that is viable to use, not to costly, for those that do not want to wire in the camera, no worries for me as wiring in an audio system except will be fun running the wiring through the hatch door.
I am actually considering just putting the camera in the rear grill instead, especially since I have already sealed and sound deadened the hatch.